Global Patent Index - EP 2503654 A4

EP 2503654 A4 20171206 - AMPLIFYING OPTICAL FIBER AND OPTICAL FIBER AMPLIFIER USING SAME

Title (en)

AMPLIFYING OPTICAL FIBER AND OPTICAL FIBER AMPLIFIER USING SAME

Title (de)

GLASFASERVERSTÄRKUNG UND GLASFASERVERSTÄRKER DAMIT

Title (fr)

FIBRE OPTIQUE D'AMPLIFICATION ET AMPLIFICATEUR À FIBRE OPTIQUE L'UTILISANT

Publication

EP 2503654 A4 20171206 (EN)

Application

EP 11744805 A 20110221

Priority

  • JP 2010035659 A 20100222
  • JP 2011053754 W 20110221

Abstract (en)

[origin: EP2503654A1] To be provided is an amplifying optical fiber allowing for efficient absorption of pumping light by an active element therein, and an optical fiber amplifier using the amplifying optical fiber. An amplifying optical fiber (20) includes a core (21) doped with an active element, a cladding (22) covering the core (21), and an outer cladding (23) covering the cladding (22). The cladding (22) meets a relationship of 0.92 ‰¤ r/R ‰¤ 0.97 where the cladding (22) has a polygonal outer shape in cross section, and the outer shape has an inscribed circle of a diameter r and a circumscribed circle of a diameter R.

IPC 8 full level

H01S 3/06 (2006.01); G02B 6/036 (2006.01); G02B 6/02 (2006.01); H01S 3/067 (2006.01); H01S 3/094 (2006.01)

CPC (source: EP US)

H01S 3/094007 (2013.01 - EP US); G02B 6/03605 (2013.01 - EP US); G02B 6/0365 (2013.01 - EP US); H01S 3/06704 (2013.01 - EP US); H01S 3/06729 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2503654 A1 20120926; EP 2503654 A4 20171206; EP 2503654 B1 20210217; CN 102782963 A 20121114; CN 102782963 B 20141210; DK 2503654 T3 20210419; JP 2011171619 A 20110901; US 2012275015 A1 20121101; US 8749877 B2 20140610; WO 2011102519 A1 20110825

DOCDB simple family (application)

EP 11744805 A 20110221; CN 201180010206 A 20110221; DK 11744805 T 20110221; JP 2010035659 A 20100222; JP 2011053754 W 20110221; US 201213528127 A 20120620